Search help parameter &1-&2 is not an EXPORT parameter

What causes this issue?

A search help can be <DS:TX.DDDOK_SHLP_TBSH>attached</> to a data
element. At this time an EXPORT parameter of the search help is defined
for the value transport for the input help.
The search help parameter defined for the data element is not an EXPORT
parameter and therefore is not suitable for the value transport.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Enter an EXPORT parameter of the search help for the search help
attachment to the data element and then activate the data element
again.

Error message extract from SAP system. Copyright SAP SE.